Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-11-000040-index-headers.html | 2011-05-05 10:37:49 | |
| 0000067716-11-000040-index.html | 2011-05-05 10:37:49 | |
| 0000067716-11-000040.txt | 2011-05-05 10:37:49 | |
 0000067716-11-000040-xbrl.zip | 73707 | 2011-05-05 10:37:49 |
| defnref.xml | 29535 | 2011-05-05 10:37:49 |
| exhibit10a.htm | 135634 | 2011-05-05 10:37:49 |
| exhibit10b.htm | 68015 | 2011-05-05 10:37:49 |
| exhibit12.htm | 46891 | 2011-05-05 10:37:49 |
| exhibit31a.htm | 12296 | 2011-05-05 10:37:49 |
| exhibit31b.htm | 13567 | 2011-05-05 10:37:49 |
| exhibit32.htm | 7779 | 2011-05-05 10:37:49 |
| FilingSummary.xml | 11316 | 2011-05-05 10:37:49 |
| Financial_Report.xls | 648072 | 2011-05-05 10:37:49 |
| mdu-20110331.xml | 715901 | 2011-05-05 10:37:49 |
| mdu-20110331.xsd | 23852 | 2011-05-05 10:37:49 |
| mdu-20110331_cal.xml | 61282 | 2011-05-05 10:37:49 |
| mdu-20110331_lab.xml | 237339 | 2011-05-05 10:37:49 |
| mdu-20110331_pre.xml | 114759 | 2011-05-05 10:37:49 |
| mduform10-q.htm | 1792105 | 2011-05-05 10:37:49 |
| R1.xml | 47123 | 2011-05-05 10:37:49 |
| R10.xml | 8591 | 2011-05-05 10:37:49 |
| R11.xml | 16582 | 2011-05-05 10:37:49 |
| R12.xml | 10098 | 2011-05-05 10:37:49 |
| R13.xml | 35660 | 2011-05-05 10:37:49 |
| R14.xml | 9365 | 2011-05-05 10:37:49 |
| R15.xml | 13128 | 2011-05-05 10:37:49 |
| R16.xml | 146326 | 2011-05-05 10:37:49 |
| R17.xml | 78900 | 2011-05-05 10:37:49 |
| R18.xml | 187393 | 2011-05-05 10:37:49 |
| R19.xml | 9111 | 2011-05-05 10:37:49 |
| R2.xml | 97883 | 2011-05-05 10:37:49 |
| R20.xml | 104767 | 2011-05-05 10:37:49 |
| R21.xml | 58974 | 2011-05-05 10:37:49 |
| R22.xml | 12000 | 2011-05-05 10:37:49 |
| R23.xml | 45804 | 2011-05-05 10:37:49 |
| R3.xml | 150432 | 2011-05-05 10:37:49 |
| R4.xml | 18706 | 2011-05-05 10:37:49 |
| R5.xml | 112438 | 2011-05-05 10:37:49 |
| R6.xml | 10395 | 2011-05-05 10:37:49 |
| R7.xml | 8744 | 2011-05-05 10:37:49 |
| R8.xml | 9538 | 2011-05-05 10:37:49 |
| R9.xml | 33086 | 2011-05-05 10:37:49 |